How should organisations close password management gaps that remain after SSO deployment?

Why This Matters for Security Teams

SSO reduces login friction, but it does not eliminate password risk across the wider environment. Organisations still carry non-SSO apps, legacy interfaces, shared service accounts, offline access paths, and secrets stored outside approved tools. That creates an exposure gap: one part of the estate is governed by the identity provider while the rest remains dependent on inconsistent local practices. NIST’s Cybersecurity Framework 2.0 frames this as a control coverage problem, not just an authentication problem.

NHIMG’s Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs shows why identity scope matters beyond the browser login: credentials and secrets need lifecycle control wherever they are used, stored, or rotated. That includes admin accounts, automation accounts, and application secrets that never pass through SSO. Security teams often overestimate SSO coverage and underestimate the amount of shadow password handling still happening in email, spreadsheets, scripts, and ticket notes. In practice, many security teams encounter password leakage only after an audit, a service outage, or a leaked secret has already created lateral movement opportunities.

How It Works in Practice

The practical answer is to treat SSO as the front door and password management as the estate-wide control plane. First, inventory where credentials still exist outside SSO: SaaS tools without federation, shared admin logins, break-glass accounts, CI/CD credentials, local device passwords, and application secrets. Then classify each one by business criticality, owner, rotation requirement, and storage location. NHIMG’s Top 10 NHI Issues is useful here because the hardest problems are usually lifecycle failures, not just weak passwords.

From there, enforce three controls in parallel:

• Move all recoverable secrets into a managed vault or secrets manager, with access logged and time-bounded.
• Eliminate shared passwords where possible by replacing them with individual accounts, federation, or delegated access.
• Apply rotation, MFA, and least privilege to every remaining local credential, including service and emergency accounts.

This is where NIST CSF 2.0 helps operationally: identify gaps, protect the remaining credential surfaces, detect misuse, and recover quickly. It is also where the secret storage problem becomes visible. NHIMG research in The State of Secrets in AppSec reports that organisations maintain an average of 6 distinct secrets manager instances, which fragments control and makes policy enforcement inconsistent. The result is that password management degrades into a patchwork unless ownership, rotation, and audit logging are standardised across every credential store. These controls tend to break down in hybrid estates with legacy desktop apps and externally managed vendors because there is no single enforcement point for authentication or secrets lifecycle.

Common Variations and Edge Cases

Tighter password control often increases operational overhead, requiring organisations to balance stronger governance against user friction and support load. That tradeoff is real, especially where business-critical tools do not support federation or where break-glass access must remain available during outages.

Current guidance suggests handling these exceptions explicitly rather than leaving them to informal workarounds. For example, offline access may require locally stored credentials, but those should be protected by hardware-backed storage, short rotation windows, and documented recovery procedures. Shared accounts are sometimes unavoidable for vendor appliances or lab systems, but they should be exceptional, monitored, and paired with compensating controls such as session recording and vault checkout approval.

Teams should also distinguish between human passwords and machine secrets. The same weaknesses that affect user passwords also apply to API keys, certificates, and tokens, but the right fix is different. NHIMG’s NHI Lifecycle Management Guide is a practical reference for deciding when to rotate, retire, or reissue credentials rather than simply resetting them. Where the environment is heavy in legacy mainframes, embedded systems, or third-party managed integrations, full SSO coverage may remain impossible and password management must be treated as a compensating control, not a cleanup task.

Related resources from NHI Mgmt Group

• What breaks when organisations keep exceptions for password-based access after moving to passwordless authentication?
• Who should own the migration from legacy endpoint deployment groups to profile-based management?
• How should organisations balance access governance and access management in a modern IAM programme?
• How should organisations build DORA-aligned ICT risk management around Active Directory and other identity services?